1. No. If you mean from character to character you can if theyre on the same account. Put whatever you want to transfer into storage and get on your other char on the same account.
2. No
3. Its not wise, you need to be able to pay for the expensive wolf upkeep as well as get the wolf. Id recommend having at least 1.5 mil before u buy a wolf.
4. Grinding. elixers are direct drops elements u get from destroying junk drops or eqipment.
5. Varies on what ur trying to sell. Usually gears 1-3rd degree jangan, 4th - 5th degree dw, 6th degree and higher hotan. Theres some exceptions to border line gear but thats a general idea. other stuff like elements/alchemy items might be best in dw or hotan except for lvl 1 elements which should be jangan.
6. PvP and job
7.
http://sro.mmosite.com/database/items_weapon.shtml
8. No
9. Not quite. You can put on a hunter card but you can always take it off and switch to another job after so you're not obligated to be one job right when u turn lvl 20
10. No
11. Varies. It depends on the star of the person and what level they are for the npc theifs. For your case if ur lvl 20 u will generally summon npcs around that level but if a lvl 60 person summons npcs they will summon npcs around that level.